Home
Class 12
CHEMISTRY
In the electrochemical reaction, 2Fe^(...

In the electrochemical reaction,
`2Fe^(3+)+Zn rarr Zn^(2+) + 2Fe^(2+)`,
increasing the concentration of `Fe^(2+)` :

A

increases cell emf

B

increases the current flow

C

decreases the cell emf

D

alters the pH of the solution

Text Solution

Verified by Experts

The correct Answer is:
C
Nernst equation `E_(cell) = E_(cell)^(@) - (RT)/(nF) "ln" ([Fe^(2+)]^(2))/([Fe^(3+)]^(2)) [Zn^(2+)]` increasing `[Fe^(2-)]` will decreases the `E_(cell)`.
Promotional Banner

Topper's Solved these Questions

  • COORDINATION COMPOUNDS

    DISHA PUBLICATION|Exercise Exercise|122 Videos

  • ENVIRONMENTAL CHEMISTRY

    DISHA PUBLICATION|Exercise Exercise -2 : Concept Applicator|15 Videos

Similar Questions

Explore conceptually related problems

If in chemical reaction, Fe^(+2) is converted into Fe^(+3) , then Fe^(+2) -

Write the half reaction for the reaction 2Fe^(+3) + 2I^(-) to 2Fe^(+2) + I_(2)

E^(o) for the reaction Fe + Zn^(2+) rarr Zn + Fe^(2+) is – 0.35 V. The given cell reaction is :

Consider the following reaction 2Fe^(3+) + 2l^(-) rarr 2Fe^(2+) + l_(2) The half-reactions for the given reaction are

The E_(cell)^(0) for the reaction Fe+Zn^(2+)hArrZn+Fe^(3+) is -0.32 volt at 25^(@)C . What will be the equilibrium concentration of Fe^(2+) , when a piece of iron is placed in a 1MZn^(2+) solution?

In the reaction x FeS_2 + yO_2 rarr Fe_2 O_3 + SO_2

In the reaction of Zn + FeSO_(4) to ZnSO_(4) + Fe

DISHA PUBLICATION-ELECTROCHEMISTRY -Exercise
  1. The solution of CuSO(4) in which copper rod is immersed is diluted to ...

    Text Solution

    |

  2. For a given reaction :M^((x+n))+n e^(-)rarr M^(c+),E^(c-).(red) is kn...

    Text Solution

    |

  3. In the electrochemical reaction, 2Fe^(3+)+Zn rarr Zn^(2+) + 2Fe^(2+)...

    Text Solution

    |

  4. What is the standard reducing potential (E^(@)) for Fe^(3+)to Fe? (Gi...

    Text Solution

    |

  5. What will be the emf for the given cell ? Pt|H(2)(g,P(1))|H^(+)(aq)|...

    Text Solution

    |

  6. Ni|Ni^(2+)(1.0M)||Au^(3+)(1.0M)| Au (where E^(@) for Ni^(2+)//Niis -0...

    Text Solution

    |

  7. For a cell reaction involvinig a two electron change, the standard emf...

    Text Solution

    |

  8. Following cell has EMF 0.7995 V . Pt| H(2) (1) atm) |HNO(3) (1M)|| A...

    Text Solution

    |

  9. An electrochemical cell is shown below Pt, H(2)(1 "atm")|HCl(0.1 M)|C...

    Text Solution

    |

  10. The emf of the cell Cr(s) abs(Cr^(3+)(1.0M))abs(Co^(2+)(1.0M))Co(s) [E...

    Text Solution

    |

  11. Define the following. (a) stable equilibrium (b) unstable equilibr...

    Text Solution

    |

  12. Equivalent conductivity can be expressed in terms of specific conducta...

    Text Solution

    |

  13. The molar conducatance of Ba^(2+) and Cl^(-) are 127 and 76 ohm^(-1) c...

    Text Solution

    |

  14. The increases in equivalent conductivity of a weak electrolyte with di...

    Text Solution

    |

  15. HNO3(aq) is titrated with NaOH(aq) condutomatrically, graphical repres...

    Text Solution

    |

  16. If X is the specific resistance of the solution and N is the normality...

    Text Solution

    |

  17. For an electrolyte solution of 0.05 mol L^(-1) , the conductivity has...

    Text Solution

    |

  18. What is the value of pK(b)(CH(3)COO^(c-)) if wedge^(@).(m)=390 S cm^(-...

    Text Solution

    |

  19. An increase in equivalent conductance of a strong electrolyte with dil...

    Text Solution

    |

  20. The correct order of equivalent conductance at infinite dilution of Li...

    Text Solution

    |